Door closer



July 2; 1929. 5, PQTTER 1.719.781

DOOR CLOSER Filed Oct. 27, 1926 2 Sheets-Sheet 1 July 2, 1929. R. s. POTTER 1.719.781

- DOOR CLOSER Filed Oct. 27, 1926 2 Sheets-Sheet 2 Patented July 2, 1929.

UNITED STATES PAYNE OFFICE.

ROBERT S. POTTER, OF GREENWICH, GONliECTICUT, ASSIGNOB TO THE YALE 8: TOWLNE MANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT.

DOOR CLOSER.

Application filed Getober 27, 1926.

This invention relates to door closers for such structures as public telephone booths, and one object is to provide means whereby the door of the booth will he held partly open until a patron open. the door fully in order to enter the booth. indicating that. the booth is unoccupied and permitting an inspection thereot Another object is to provide mechanism for the stated purpose which will 'ause the door to close tully when the booth is occupied or the patron leaves the booth and n'iaintain such po nion until an attendant again sets the door in its partly open position. These objects and other ob jects which will hereinafter incidentally appear are attained in such an apparatus as is illustrated in the accompanying drawings, and the invention resides in certain novel teatures which will be particularly pointed out in the appended claims.

In the drawings, Figure 1 is a top plan view of a door check and closer ha vingthe present in vention applied thereto;

Figure 2 is a vertical sectional elevation of the same;

Figure 3 is a detail plan view of the top cap Figure 4 a detail plan of the locking can formed for a right hand closer;

Figure 5 is a detail plan view of the latch;

Figures 6 and T are detail edge views of the latch showing it arranged for a left; hand and right hand closer respectively;

Figure 8 is a top plan View of the device in the position assumed when the door is fully closed;

Figure 9 is a similar view showing the position oi the parts when the door is open about six inches.

The door che k and closer proper comprises a casino 1 secured to the door and containing: a. spring" 2. and a. spindle 3 which carries a lever or main arm 4, the latter being connected to an anchoring arm 5 seemed to the door frame. lVhen the door is openeih the lever or main arm acts through the spindle and intermediate connections to place the spring under tension, and when the door-opening three is withdrawn the spring reacts through the lever to close the door. all these parts being of wellluiown construction, arrangement and operation.

In carrying out the present invention. a lockin cam 6 is formed on the top cap 7 ot the closer at the margin thereot, said'cam havin; a notch 8 formed in its outer side while its Serial l lo. 144,575.

inner .e t) detines an arc concentric with the litl'il)lict g' ot the cap. The ends it) and 11, of the cam are preferably straight but are arranged on angles to the radii ot the *ap so that ihcy are oblique lo the path of the latch which will be piescnlly described. The forward wall l1! ol the notch S is also straight and is preferably parallel with the end wall ll. as clearly shown in l igures 3 and 4, and it may be here noted that the cam may be adapted to either a right or left hand closer by mere ly inverting. In the lever or main arm l at a point rcnioved treat the closer ap is termed or :ecured a stud til having! a diamctrical opening therethrough to receive and hol l the outer end ot a line spring or light resilient od it which extends longitudinally ol' the lever and has its inner end engaged and held in a diametrical opening through the upper end of a pivot post 15 fixed at one end of a latch l6 and rotatahly fitted in an opening; provided therefor in the lever. The latch 1C is a curved arm or plate contorming: substantially to the curvature of the cap and extending; tron) the lever toward the locking cam. a stud 1? being n'ovided at the free end ot the latch to cooperate with the cam, the stud and the post projecting from one or the other side of the latch accordingly as it is to be applied to a right or left hand closer.

In manufacturing. it has been found desirahle to cast the la ch with a post on each side and to cut oil the undesired post when the latch is to be lli tl;ll)lttl in a closer. The stud 1'? is formed separately and secured in an opening provided thereto! in the lat h and may. ol' course. he disposed to project at. either side ot' the latch.

initially. the door is held partly open by engagement of the latch stud 17 in the notch s oi the locking cam, the door-closer parts assinninsr the relative positions shown in Fig. When a patron opens the door fully in order to enter the booth, the main arm or lever moves relative to the closer in the direction indicated by the arrow in Figure 9, the stud 17 being; thereby caused to ride on the w: ll 12 ot' the notch 8 whereby the latch will he disengaged from the cam. the stud moving to a point beyond the end ll oi" the cam. Then. wnen the door is permitted to closet the spring; ll holds the latch in such position that the stud 17 will engage the end 11 of the cam and ride inwardly thereon, thence along the inner side 9, and

tltl

ltltl Ill) wine to rest at a point in front 0? the cam. as shown in Figure 8. hen the patron (5; ns the door to leave the booth. the stud 17 ot the latch ill he carried against the end surt'ace 10 ot' the cam and he deflected outwardly to ride along) the outer side of the can! and re erilr-ed movement as the door c. ts behind the departing patron. .Yhen the attendant desires to reset the door. he merely opens it slowh until the latch drops into engagement with the notch in the locking cam.

l'laving fully described m v invention what l iimas new and desire to secure hv Letters Patent ls? L l, The coni ination with a door-closer inl J a lever, and a motor device actint); an the l ver to close the door, of a lat h carried. hr the lever. and a cam in the path ol the la h having a notch in its outer side to h engaged hv the latch tor holding the door partly open and having its ends disposed obliquely with respect to the latch whet-eh the latch will he deflected to the onter side of the cam on opening movement of the door and to the inner side of the cam on closing movenie t of the door.

:2. The combination with a door closer including a pivoted lever and a motor device acting on the lever to close the door ot a latch pivotally mounted on the lever for movement ahout an axis parallel to the axis ot movement of the lever, and a cam in the path of the latch having a notch in one of its sides to he engaged by the latch for holding the door partly open, and havingits ends so shaped with respect to the latch that the latter will he deflected to one side of the (M11 on opening movement of the door. and to the other pride of the cam on closing movement ot. the door.

3. The combination with a door closer, including a lever and a motor device acting on the l to close the door, of a latch pivotalty iionnted on the lever, a cam in the pat h ot' the latch having a notch in its outer .:de to he engaged by the latch for holding the door partly open, and having its ends so shaped with respect to the latch that the latter will he detlected to the inner side of the cam on opening movement of the door, and to t ie outer side of the cam on closing movement of the door, and spring means for yieldlno'l holding the latchin a position to engage the cam when the lever is moved in either direction.

In testimony whereof. I have signed this specification.

ROBERT S. POTTER. 

